1938945625297 has 2 divisors, whose sum is σ = 1938945625298. Its totient is φ = 1938945625296.

The previous prime is 1938945625291. The next prime is 1938945625343. The reversal of 1938945625297 is 7925265498391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1876341081616 + 62604543681 = 1369796^2 + 250209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1938945625297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1938945625291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969472812648 + 969472812649.

It is an arithmetic number, because the mean of its divisors is an integer number (969472812649).

Almost surely, 2^{1938945625297} is an apocalyptic number.

It is an amenable number.

1938945625297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938945625297 is an equidigital number, since it uses as much as digits as its factorization.

1938945625297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 293932800, while the sum is 70.

The spelling of 1938945625297 in words is "one trillion, nine hundred thirty-eight billion, nine hundred forty-five million, six hundred twenty-five thousand, two hundred ninety-seven".